TITLE: GCN CIRCULAR NUMBER: 6923 SUBJECT: GRB 071010B: TLS 3rd Epoch - finally a break?? DATE: 07/10/16 14:53:51 GMT FROM: Alexander Kann at TLS Tautenburg D. A. Kann, U. Laux & R. Filgas (TLS Tautenburg) report: We observed the afterglow (Oksanen, GCN 6873) of GRB 071010B (Markwardt et al., GCN 6871) with the Tautenburg 1.34m Schmidt telescope under mediocre conditions (low transparency), obtaining 12 600 second images in the Rc band at 5.3 days after the GRB. The afterglow is faintly detected in all frames. We create a stacked image and, using the same comparison stars as Kann, Hoegner & Filgas (GCN 6918), we derive the following magnitude: Date Mid-Time Rc dRc 16.09041 5.22528 21.293 0.045 In comparison with earlier data (see Kann, Hoegner & Filgas, GCN 6918, for references, and adding Kocevski et al., GCN 6919; Im, Lee & Urata, GCN 6920), we find the afterglow to be 0.3 magnitudes fainter than the extrapolation of the earlier decay. This may indicate that a break has occured. Inclement weather and an instrument switch will probably not allow us to obtain another epoch. Further follow-up at other northern facilities is strongly encouraged to check the validity of the break. This message may be cited.